Surgeon (source code)
= Surgeon
{tag=Surgery}
{wiki}
A \b[surgeon] is a <physician> with specialized training in evaluating and treating conditions for which <surgery> may be appropriate. The role includes deciding whether an operation is justified, performing the relevant operative work, and directing <perioperative care>. The <American College of Surgeons> describes competence in terms of education, training, experience and demonstrated proficiency, rather than the ability to perform an isolated manual maneuver.<Statement on Principles by the American College of Surgeons>[Sections I.A and I.D, competencies and eligibility; Section II.B, scope of surgical care]{ref}
Surgical reasoning connects <anatomy> with <physiology>. Knowing where structures lie is different from knowing how an intervention will change their function. The response of living <tissue> also connects <biomechanics>, healing and the condition of the surrounding tissue. An operation can achieve an immediate geometric objective while its later biological outcome still depends on these processes.
An original mechanical example illustrates why local geometry matters. If a tensile <force> $F$ is carried uniformly through load-bearing area $A$, nominal <stress> is
$$
\sigma=\frac FA.
$$
A chosen force $1\,\mathrm N$ over $1\,\mathrm{mm^2}$ gives $1\,\mathrm{MPa}$; the same force over half that area gives $2\,\mathrm{MPa}$. This idealized calculation explains a geometric sensitivity, rather than specifying a tissue's actual strength or a surgical technique. Real <tissue> can be anisotropic and nonlinear, so a nominal stress alone does not determine its biological response.
Evaluating outcomes also requires scientific judgment. In a hypothetical audit, 20 adverse outcomes among 200 cases give a crude rate $10\%$, while 5 among 100 give $5\%$. The difference does not by itself identify a difference in surgical skill or treatment effect: the groups may differ in underlying illness, operation complexity and follow-up. <Causal inference> requires a comparison that addresses how the groups were formed, rather than treating every outcome percentage as a controlled experiment.
The decision is shared with the <patient>. <Informed consent> includes the proposed operation, its risks and benefits, alternatives including nonoperative care, and the roles of the treating team. Responsibility also extends beyond the operation through postoperative and continuing care.<Statement on Principles by the American College of Surgeons>[Sections II.A–B, informed consent and alternatives; Sections II.E–F, postoperative responsibility and continuity]{ref} Thus operative skill, biological understanding and evaluation of evidence are connected parts of the profession.
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